One verse

Srimad Bhagavatam 4.12.36

4.12.36

यद्भ्राजमानं स्वरुचैव सर्वतो लोकास्त्रयो ह्यनु विभ्राजन्त एते । यन्नाव्रजञ्जन्तुषु येऽननुग्रहा व्रजन्ति भद्राणि चरन्ति येऽनिशम् ॥ ३६ ॥

yad bhrajamanam sva-rucaiva sarvato lokas trayo hy anu vibhrajanta ete yan navrajan jantusu ye ’nanugraha vrajanti bhadrani caranti ye ’nisam

yat
which planet
bhrajamanam
illuminating
sva-ruca
by self-effulgence
eva
only
sarvatah
everywhere
lokah
planetary systems
trayah
three
hi
certainly
anu
thereupon
vibhrajante
give off light
ete
these
yat
which planet
na
not
avrajan
have reached
jantusu
to living entities
ye
those who
ananugrahah
not merciful
vrajanti
reach
bhadrani
welfare activities
caranti
engage in
ye
those who
anisam
constantly

The self-effulgent Vaikuntha planes, by whose illumination alone all the illuminating planes within this material world give off reflected light, cannot be reached by those who are not merciful to other living entities. Only persons who constantly engage in welfare activities for other living entities can reach the Vaikuntha planes.